Bracket for grand-piano actions.



PATENTED APR. 11, 1905.

E. BORNHOEFT.

BRACKET FOR GRAND PIANO ACTIONS.

APPLIGATION FILED JAN. 6, 1905.

Fly. 2.

Mizzesse UNITED STATES Patented April 11, 1905.

PATENT OFFICE.

EDWVARD BORNHOEFT, OF NEWV YORK, N. Y.

SPECIFICATION forming part of Letters Patent No. 787,069, dated April 11, 1905.

To all whmn it may concern.-

Be it known that I, EDWARD BoRNHoEEr, a citizen of the United States, residing at New York city, Bronx, county and State of New York, have invented new and useful Improvements in Brackets for Grand-Piano Actions, of which the following is a specification.

This invention relates to an improved bracket for grand-piano actions which is attached to the key-frame by means of a base interposed between the key-frame and the bracket.

It is frequently necessary while mounting, adjusting, or repairing actions to remove the brackets carrying the same from the keyframe and to then reattaeh the brackets; but the frequent attachment and removal of the brackets to the wooden key-frame will enlarge the screw-holes of the latter and cause objectionable .looseness of the connections. By my invention a metal base is permanently secured to the key-frame, and the bracket is removablyfitted to the base,so that the bracket, together with the action, may be readily removed without in any way disturbing the keyframe.

In the accompanying drawings, Figure 1 is a side view of my improved bracket, partly broken away and showing the rails in crosssection. Fig. 2 is a plan of the bracket with the rails removed, and Fig. 3 a plan of the base.

The letter A represents the bracket of a grand-piano action, carrying the action-rail a, hammer-rail (1/, and regulating-rail (0 as usual. The bracket A is removably mounted upon a metal base B, which in turn is secured to the wooden key-frame D by screws 1) 7/. Of these the screw 6 passes through an opening near one end of the base, while the screws 6 pass through flanges b at the other end of the base. From the base B projects upwardly a front arm 6 and a rear arm I)", having a flat top and an inclined front 7/. The lower end of bracket A rests at its front upon the top of base B between the arms 6 Z). At its back the bracketA is provided with an inclined side a, faclng the inclined side 6" of arm 1), and

Application filed January 6, 1905. Serial No. 239,895.

with a horizontal extension (6, that rests upon the fiat top of said arm. Into the front arm a is tapped a screw 0, that engages with its head a conical socket a in the front of bracket A, the whole constituting an adjustable abutment that permits an aceurate'adjustment between the parts. Into the horizontal extension a" is fitted a screw 0, engaging a tapped opening in rear arm 7). By tightening the screw 0 the inclined plane a is wedged against the inclined plane If, so as to force the socket a against the head of screw 0, and thus lock the bracket to its base.

It will be seen that by withdrawing the screw 0 the bracket A may be detached from the base B and may thus be removed from the key-frame without disturbing the latter.

lVhat 1 claim is- 1. The combination in a piano, of a keyframe with a base mounted thereon and having a pair of upward-extending arms, a pianobracket projecting between said arms, and means for securing the bracket to the base, substantially as specified.

2. The combination in a piano, of a keyframe with a base mounted thereon and having a pair of upward-extending arms, one of which has an inclined side, a piano-bracket projecting between said arms and having an inclined side to engage the inclined side of the base-arm, and means for securing the bracket to the base, substantially as specified.

3. The combination in a piano, of a keyframe with a base mounted thereon and having a pair of upward-extending arms, the rear arm having an inclined side, a piano-bracket having an inclined side to engage the inclined side of the rear arm, an abutment between the bracket and the front arm, and means for securing the bracket to the base, substantially as specified.

Signed by me at New York city, Manhat- 0 tan, New York, this 5th day of January, 1905.

EDlVARD BORNHOEFT.

Witnesses:

FRANK v. BRIESEN, FRED UNFRICHT. 

